package com.qiang;

import java.util.*;
import java.util.stream.Stream;

public class Test06 {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        Stream<String> stream = list.stream();

        Set<String> set = new HashSet<String>();
        Stream<String> setStream = set.stream();

        HashMap<String, Integer> ss = new HashMap<>();
        Stream<String> stream1 = ss.keySet().stream();
        Stream<Integer> stream2 = ss.values().stream();
        Stream<Map.Entry<String, Integer>> stream3 = ss.entrySet().stream();

    }
}
